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60%-x
x=60*70:100
x=42
140%-42
100%-x
x=100%*42:140
x=30
Odp.: Ania ma 42 autografy, a Basia 30 autografów.
60%- x
100x= 60* 70= 4200/100
x= 42
140%-42
100%- x
140x= 4200/140
x= 30
Ania ma 42, a Basia 30 autografów.
40/100 x 70= 28 70-28=42 - Ania
42=140/100 x B
B=42:140/100
B=42x 100/140
B= 30
Odp: Ania miała 42 autografy a Basia 30...miałam to na lekcji...i jest dobrze ;)